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[directfb-dev] Re: [PATCH] v4l system-only surface support
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[directfb-dev] Re: [PATCH] v4l system-only surface support

On Sat, Jun 29, 2002 at 09:43:14AM +0200, Mike Pieper wrote:
> On Thursday 27 June 2002 22:05, Denis Oliver Kropp wrote:
> > ...
> > Someone could add the missing bits by using Mike's code.
> I'll make a new patch. The existing patch with an extra file which is mostly a 
> copy of the existing v4l-provider wasn't such a good idea, because it's 
> difficult to maintain. The new one will patch directly the existing file.

Did you see my latest patch (v4l_fix.patch)? It fixed the field sync
stuff and cleaned up the code. Did anyone see the patch? I haven't
received any comments on it nor has it appeared in cvs.

> I also have an idea how to tell the provider what it should do 
> (grabbing/overlay) at runtime. The idea is, to add a string at the end of the 
> filename to give the driver some hints. Like this:
> /dev/video0:overlay  or /dev/video0:grab
> What do you think about that?

I'm not sure what benefit that would have. When AGP surfaces become
supported it might be useful depending on how the surface allocation is

If v4l would allow user space dma and/or syncing with VIDIOCCAPTURE things
would be so much nicer. How does v4l2 handle this? AFAIK at least parts of
it are going into 2.5.

Ville Syrjälä

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